Improvement in sash-fasteners



s. W. BIDWELL.

' SASH FASTENER- 480 v JE tZ EMZZ II Patented Feb. 17,; 1863.

UNITED. STATES PATENT OFFICE.

SAMUEL W. BIDWELL, on HARTFO D, CONNECTICUT.

IMPROVEMENT IN SASH-FASTENERS.

Specification forming part of Letters Patent No. 87,671, dated February 17, 1863.

To all whom it mag concern Be it known that I, SAMUEL W. BIDWELL,

of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Window- Sash Fasteners; andI do hereby declarethat the followingis a full, clear,'and exact de scription of the same, reference being had to the accompanying drawings, making a part of: this specification, and 'to'the letters of reference-marked thereon,in which- Fignre 1 shows a side view of the sash lock. .or fastener. Fig. 2is afront view of the same.

Fig. 3 is a side view of the swinging catchpiece 0. Fig. 4 is a front view of the same,-

and Fig.5 illustrates a modification of my in so arranged that the sashes may be locked when the upper. sash is lowered some distance for purposes of ventilation, 'as hereinafter set forth; and to this end my said invention consists in the employment, in'or onthe frame of the window-casing, of a perforated-plate, to the back of which is hinged a doublepronged swinging catch-piece, the two prongs of which, when the sashes are closed, protrude through the perforations of the plate, and lock the two sashes, substantially as hereinafter clearly described.

To enable others skilled in the arts to make and use my invention, I will proceed to a description thereof.

In the accompanying drawings, ais an oblong metallic plate, to the back of which is hinged, at b,the upper end of a swinging piece, 0, the lower end of which is formed into two pron gs, d and e, which project at a right angle from the body of c, and protrude'throvgh two apertures, f and 9, made through the plate a.- The swingtpiece o, of the form shown in Fig. 1, is so shaped that thegreater part of its The apparatus. made as above described is shownin Figs. 6, 7and 8, as applied to a window.

Fig. 6 being an elevation, partly in section, of portions of the casing and of the upper and lower sashes, Fig. 7 a section through part of the casin g, showing the upper sash, the parting strip having been 'removed,-and-Fig. 8 a vertical cross-section through both sashes, in

which figures his the pulleystile of the casing, i-is part of the lower sash, k part of the upper, and l the parting-strip. The pulleyfstile h is excavated suificiently to receive the swing-piece c of the sash-lock, and to allow it to swing'back so far that the points of the catch-prongs, will not protrude beyond the "face of the plate a, as shown by dotted red lines in Figs. 6 and 7. The plate a, covering and'hiding the aperturein the stile h,is firmly secured thereto by screws, and is so located that the catch-prongs d and 0 lie one on either side of the parting-strip l, and at such a height that when both the sashes are closed the inner catch-prong, (1, will protrude just above theupper edge of the rail of the lower or inner sash, 5, while the outer prong, e, enters. a notch, m, whichis made in the edge of the stile of the upper sash, k, thereby locking the two sashes so that the upper one cannot be .lowered nor the lower one raised. When the swing-piece c is pushed. back, as may easily be done by pressing inthe prong d, the window may be opened, as both sashes are thus unlocked, but whenever the window is closed the swing-piece 0 will swing forward into its normal position, with the prongs d and 2 protruding, thus making the window self-locking when closed.

Abovethe notch m one or more notches, it, may be made in the edge of the upper sash, into which the prong It will enter when the upper sash is lowered some distance, by which arrangement the window may be opened a little at the top, when this is desired','and yet may be kept securely locked.

Although I prefer to make the swing-piece 0 of such shape that its own weight will op-' sion-plate a, the whole constructed substanerate it, yet it may. in order to saveweight .tially in the manner hereinbefore described,

of metal, have at its back a spring, 0, (see and operating to look both sashes of awindow,

Fig. 5,) to press its catch-prongs outward. as set forth.

Having" thus described my invention, what I claim as my invention, and desire to secure by Letters Patent, is Witnesses:

The double-pronged swinging catch-piece CHAS. BEGKWITH,

c, in combination with the perforated suspenl GEO. S. GIDMAN.

SAMUEL W. BIDWELL. 

